Students are also resistant to using it at first and will mark it wrong on a test because they learn that stative verbs cannot take a progressive form. For example, we cannot say "He is being a lawyer now" or "I am seeing a bird out the window now." This sentence ("The soup is being tasted by John") is the passive form of "John is tasting the soup." It is not the copula "is" in the progressive form.
Anyway, have a good one, and don't let any soup taste you!